Datasheets

SY87729L3.3V AnyClockВ®, 10MHz to 365MHzFractional N Synthesizer General DescriptionThe SY87729L is a complete rate independent frequencysynthesizer integrated circuit. From a single referencesource, this device generates a differential PECLreference frequency for Micrel's SY87721L 10Mbps to2.7Gbps combined CDR and CMU.The SY87729L generates an exactly correct referencefrequency for common data transport protocols. This isespecially important in transponder applications, where astandards compliant protocol data unit must be generateddownstream, even in the absence of any signal from theassociated upstream interface.In addition, SY87729L will generate exactly correctreference frequencies for common data transport protocolsaugmented by forward error correction codes.For proprietary applications, the SY87729L generatesreference frequencies guaranteed to enable the SY87721LCDR to lock to any possible baud rate in its range.SY87729L accepts configuration via a MicroWireв„ўinterface.Data sheets and support documentation can be found on …

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Production (Appropriate for new designs but newer alternatives may exist)